Shear-wave seismic reflection studies of unconsolidated sediments in the near surface

Geophysics
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Abstract

We have successfully applied of SH-wave seismic reflection methods to two different near-surface problems targeting unconsolidated sediments. At the former Fort Ord, where the water table is approximately 30m deep, we imaged aeolian and marine aquifer and aquitard stratigraphy to a depth of approximately 80m. We identified reflections from sand/clay and sand/silt interfaces and we mapped these interfaces along our transects. At an aggregate study site in Indiana, where the water table is at a depth of 1to2m, we imaged stratigraphy in alluvial sand and gravel, and observe a strong reflection from the 32-m-deep bedrock surface. In both cases, we exploited the high resolution potential of SH waves, their insensitivity to water content, and the possibility of reducing Love wave contamination by working along a roadway. We accomplished our results using only sledgehammer sources and simple data processing flows.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Shear-wave seismic reflection studies of unconsolidated sediments in the near surface
Series title Geophysics
DOI 10.1190/1.3340969
Volume 75
Issue 2
Year Published 2019
Language English
Publisher Society of Exploration Geophysicists
Contributing office(s) Crustal Geophysics and Geochemistry Science Center, Central Energy Resources Science Center, Energy Resources Program
Description 8 p.
First page B59
Last page B66
Country United States
State California, Indiana
City Columbus, IN